Envelop-cutting machine.



No. 863,840. I PATENTED AUG. 20, 1907. 0. FREESEL' ENVELOP CUTTINGMACHINE, APPLICATION rninn APR. 28. 1901.

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NO. 863340. PATBNTED AUG. 20, 1907.

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ENVELOP CUTTING MACHINE. APPLICATION FILED'APR. 26. 1907.

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OSCAR FREESE, OF CHICAGO, ILLINOIS.

ENVELOP-CUTTING MACHINE.

Specification of Letters Patent.

Patented Aug. 20, 1907.

Application filed April 26, 1907. Serial No. 370,379.

and useful Improvements in Envelop-Cutting Ma-' chines, of which thefollowing is a specification.

This invention is an adjustable head for holding the cutting knives ofenvelop cutting machines, and has for its object to provide a head onwhich the knives can be quickly and easily adjusted to accommodate allordinary sizes of envelops.

Although particularly adapted for use in connection with envelop cuttingmachines, the invention is applicable to machines for cutting sheets ofany kind, the invention residing in the particular manner in which theframe is made and the knives held thereon.

The invention is illustrated in the accompanying drawings, in whichFigure l is a top plan view of the head. Fig. 2 is an inverted planview. Fig. 3 is a side elevation with parts in section. Fig. 4 is asection on the line 4-4 of Fig. 1. Fig. 5 is a section on the line 5-5of Fig. 1.

Referring specifically to the drawings, 1 indicates theframe of thehead, rectangular in shape, and made with channel beams or bars at thesides. Extending across this frame, from side to side, are a pair ofcross bars which hold the knives, each bar consisting of two I-beams 2placed side by side and held together and spaced apart at the ends bymeans of blocks 11 located between said ends, and bolts 12. This forms aslot or space between the two I-beams of each cross bar, in which slotsare located blocks 8 to which the knives A are fastened, by means ofplates 8 having stems 8 extending through the blocks. The outline orcutting edge of these knives may be made as desired, according to thedesign to be cut. There are usually four of the blocks, two at eachcross bar. The blocks and knife plates are fastened to the beams 2 bymeans of bolts 13 which extend vertically through the stems and are heldby a clamp or washer 9 at the top and thumb nut 10 above the same. Byloosening the nuts the blocks 8 can be moved along the slots between thebeams 2, to any desired position, and there fastened, thus adjusting thelateral position of the knives with respect to each other. Also thestems can be turned in the blocks to vary the angles of the knives.

The ends of the I-beams 2 fit and are slidable between the flanges ofthe channels forming the side pieces of the frame 1, and said beams areoperated by means of right and left screws 3. These screws are turned bymeans of a crank 6 and a chain belt 5 connecting two sprockets 4 on theends of the screws, outside the frame. The screws extend throughthreaded bushings in the spacing blocks 11 and the I-beams 2, and whenoperated serve to move said beams closer together or farther apart so asto vary the distance of one pair of knives from the other pair. Thescrews 3 are supported at the middle by brackets 7 which fit in thegroove in the screws and prevent any endwise movement thereof.

The construction shown provides or allows both lateral and longitudinaladjustment of the knives with respect to each other. The knife bars aremoved and adjusted with respect to each other by turning a single crank,and any single knife can be set or adjusted by manipulation of one bolt.At the same time, the knives are firmly supported and will not yield orVibrate. These heads are used in envelop cutting machines and are raisedand lowered by power provided for the purpose, but inasmuch as thepresent invention relates to the construction of the head no particulardescription of the means for operating the same is considered necessary.

I claim:

1. A cutter head comprising an outer frame, parallel knife barsextending across within the same and adjustable toward or from eachother, and knives fastened to the bars and adjustable along the same,toward or from each other.

2. A cutter head comprising an outer frame having right and left screwsat the sides thereof, and knife bars which extend across the frame andtravel at their ends on the screws, whereby the bars may be adjustedtoward or from each other.

3. A cutter head comprising a frame, knife bars extending across thesame and having longitudinal slots or re cesses, knife blocks adjustablealong in the slots, and means to fix the blocks at adjustment.

4. In a cutter frame, a knife bar formed of two spaced angle beamsextending side by side and having spacing blocks therebetween at theends, and blocks to which the knives are attached, located between saidbeams and slidable therebetween, and clamps to hold the blocks as set.

5. A cutter head comprising a frame having channel beams at the sides,knife bars extending across the frame and fitting at the ends in saidchannels, and right and left screws extending through the ends of thebars, at

' each side, and adapted to shift the bars toward or from each other.

6. A cutter head comprising a frame, knife bars extend ing across thesame, right and left screws at each side of the frame, engaging the endsof the bars to draw said bars toward or from each other, and gearingbetween the screws on opposite sides, to cause their simultaneousoperation.

In testimony whereof I aihx my signature, in presence of two witnesses.

OSCAR. FREESE.

Witnesses:

INNES J. Boron, H. G. BATCHELOR.

